I installed my RB's myself, there is a styrofoam plate used as backing in between the base support and the rubber studs if it is not centered right it will fail to keep the rubber stud in the holes and will remain depressed when stepped on. The Aluminum plate does not lift because screws hold it in place. I just made sure the styrofoam plate is centered and catches all the rubber before tighthening everything. No issues with my RBs and I am more confident with my install than the dealers.
